For the fitting of the glass try these guys:http://www.skywindscreens.co.za/
They are based in Jhb though.
They were good on my car and asked a fraction of Glassfit's price.
Also, the part was the genuine thing. No fake.

If you strugglele to get the part, try Dawid Volschenk, Oh, eight, three, four-nine-nine, one, five, double eight.
I think those rear screens were all the same on the GU models.